Vendors have added the ability to "remix" a midi file , but many people don't use the features.. I have the SD1, if I use a midi file in performance, I try to remix the drum tracks with Sd1 tracks as much as possible...
Another example is wav syncipation, great idea, but sifficult to implement easily...
I have found that crowds will recognize a song from a midi sequence quicker vs. using generic styles..
Yamaha allows you to syncipate a midi sequence with one of their styles, which in turn can give a midi sequence a different feel, but not many people use the feature imo....
Dan O'